CN111213300B

CN111213300B - Wireless charging device provided with wireless communication coil

Info

Publication number: CN111213300B
Application number: CN201880066740.1A
Authority: CN
Inventors: 林成炫
Original assignee: LG Innotek Co Ltd
Current assignee: LG Innotek Co Ltd
Priority date: 2017-08-11
Filing date: 2018-08-07
Publication date: 2024-04-12
Anticipated expiration: 2038-08-07
Also published as: CN111213300A; KR20190017565A; KR102420942B1; WO2019031818A1

Abstract

The present invention relates to a wireless charging device provided with a wireless communication coil. According to one embodiment, a wireless charging apparatus provided with a wireless communication coil may include: a first substrate on which the wireless communication coil is arranged; a wireless charging coil module comprising one or more wireless charging coils disposed below the first substrate; a shielding material disposed below the wireless charging coil module; a first bracket disposed below the shielding material and provided with a first support portion and a second support portion for supporting the first substrate; a second substrate disposed below the first bracket and provided with electronic components; and a second bracket provided with a first support portion and a second support portion for supporting the second substrate, and including one or more shielding portions to correspond to the electronic component.

Description

Wireless charging device provided with wireless communication coil

Technical Field

The present invention relates to a wireless charging device including a wireless communication coil.

Background

A portable terminal such as a mobile phone or a notebook computer includes a battery for storing power and a circuit for charging and discharging the battery. In order to charge the battery of the terminal, power needs to be supplied from an external charger.

Generally, as an example of an electrical connection method between a battery and a charging device for charging the battery, there is a terminal supply method in which commercial power is supplied and converted into voltage and current corresponding to the battery to supply power to the battery through a terminal of the battery. This terminal supply method requires the use of physical cables or wires. Therefore, when using many devices employing the terminal supply method, many cables occupy a considerable work space, are difficult to arrange, and have poor appearance. In addition, the terminal supply method may cause problems such as instantaneous discharge due to different potential differences between terminals, burnout or ignition due to foreign substances, spontaneous discharge, and degradation of battery life and battery performance.

Recently, in order to solve these problems, a charging system (hereinafter referred to as a "wireless charging system") and a control method using a method of wirelessly transmitting electric power have been proposed. In addition, in the past, wireless charging systems on some portable devices were not standard and consumers had to purchase separate wireless charging receiver accessories, so the demand for wireless charging systems was low. In the future, the number of users using wireless charging is expected to increase rapidly, and terminal manufacturers will basically have wireless charging functions.

Generally, a wireless charging system includes a wireless power transmitter that provides power through a wireless power transmission method, and a wireless power receiver that receives power provided from the wireless power transmitter and charges a battery.

In addition, due to the development of mobile communication and information processing technologies, portable terminals provide various wireless internet services such as content services and video calls. Such portable terminals apply Near Field Communication (NFC) technology to provide the above-described services. As contactless short-range wireless communication using the 13.56MHz band, the NFC technology refers to such a communication technology: data is transmitted bi-directionally between terminals within a short distance of 10 cm.

In addition, in recent portable terminals, in order to increase the convenience of users, a design technology of a wireless charging device has been developed, which can simultaneously provide the above NFC function to a wireless communication coil of a wireless charging coil having a wireless charging function.

[ problem ]

The present invention is designed to solve the related art problems, and it is an object of the present invention to provide a wireless charging device including a wireless communication coil.

In addition, the present invention aims to provide a wireless charging device including a wireless communication coil capable of wireless communication and wireless charging.

Further, the present invention provides a wireless charging device including a small-sized wireless communication coil.

In addition, the present invention provides a wireless charging device including a wireless communication coil having an excellent heat dissipation effect.

Further, the present invention provides a wireless charging device including a wireless communication coil including a plurality of brackets that effectively radiate heat.

In addition, the present invention provides a wireless charging device including a wireless communication coil having excellent EMI blocking characteristics.

Further, the present invention provides a wireless charging device including a wireless communication coil capable of preventing electronic parts from being damaged by EMI.

In addition, the present invention provides a wireless charging device including a wireless communication coil having a simple structure.

Further, the present invention provides a wireless charging device including a wireless communication coil that simplifies the manufacturing process.

In addition, the present invention provides a wireless charging device including a wireless communication coil with low manufacturing cost.

Technical problems to be solved in the present invention are not limited to the above technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the following description.

[ technical solution ]

In order to solve the above-described problems, a wireless charging apparatus according to an embodiment may include: a first substrate on which a wireless communication coil is arranged; a wireless charging coil module including one or more wireless charging coils disposed under the first substrate; a shielding material disposed below the wireless charging coil module; a first support disposed under the shielding material and including a first support portion and a second support portion for supporting the first substrate; a second substrate disposed under the first bracket and including an electronic component; and a second bracket including a first support portion and a second support portion for supporting the second substrate, and including one or more shielding portions corresponding to the electronic components.

In addition, in the wireless charging device according to the embodiment, the shielding part of the second bracket may include a first surface and a second surface, the first surface may be arranged to extend from a bottom surface of the second bracket to an outside of the second bracket, and the second surface may be bendable and extend vertically upward from one end of the first surface.

Further, in the wireless charging device according to the embodiment, the first bracket may include one or more fixing portions, the second substrate may include one or more fixing holes, and the one or more fixing portions may correspond to the one or more fixing holes and may be inserted and fixed in the one or more fixing holes.

Further, in the wireless charging device according to the embodiment, the fixing portion may include a supporting protrusion and a hook portion, and the supporting protrusion may be bent and extend downward from a bottom surface of the first bracket to separate the first bracket and the second substrate, and the hook portion may include: an extension portion extending downward from the support protrusion, and a shielding portion bent and extending from one end of the extension portion, wherein the extension portion of the hook portion may pass through the fixing hole, and the shielding portion of the hook portion may be disposed under the second substrate.

In addition, in the wireless charging device according to the embodiment, the shielding portion of the hook portion may be arranged to correspond to the electronic component of the second substrate.

Further, in the wireless charging device according to the embodiment, the first support portion of the first bracket and the first support portion of the second bracket may form the first ground portion and the second ground portion, and the second support portion of the first bracket and the second support portion of the second bracket may form the third ground portion and the fourth ground portion.

Further, in the wireless charging device according to the embodiment, one side of the first support portion of the first bracket and one side of the first support portion of the second bracket may be grounded through the first fastening member in the first grounding portion, the other side of the first support portion of the first bracket and the other side of the first support portion of the second bracket may be grounded through the second fastening member in the second grounding portion, one side of the second support portion of the first bracket and one side of the second support portion of the second bracket may be grounded through the third fastening member in the third grounding portion, and the other side of the second support portion of the first bracket and the other side of the second support portion of the second bracket may be grounded through the fourth fastening member in the fourth grounding portion.

In addition, the wireless charging apparatus according to the embodiment may further include a bottom cover accommodating the second bracket, wherein the second bracket may include one or more leg parts, and the bottom cover may include one or more internal support parts that support and ground the one or more leg parts of the second bracket.

The wireless charging apparatus according to an embodiment includes: a first substrate on which a wireless communication coil is arranged; a wireless charging coil module including one or more wireless charging coils disposed under the first substrate; a shielding member disposed under the wireless charging coil module; a first support disposed under the shielding material and including a first support portion and a second support portion for supporting the first substrate; a second substrate disposed under the first bracket and including an electronic component; and a second bracket including a first support portion and a second support portion for supporting the second substrate, wherein the first bracket is inserted into one or more fixing holes of the corresponding second substrate, respectively, and the first bracket may include one or more fixing portions including a support protrusion and an annular portion.

In addition, in the wireless charging device according to the embodiment, the fixing portion includes a supporting protrusion bent and extending downward from a bottom surface of the first bracket to separate the first bracket and the second substrate, and the ring portion includes an extending portion extending downward from the supporting protrusion and a shielding portion extending from one end of the extending portion and bent, wherein the extending portion of the ring portion may pass through the fixing hole and may be disposed under the second substrate.

Further, in the wireless charging device according to the embodiment, the shielding portion of the annular portion may be arranged to correspond to the electronic component of the second substrate.

The wireless charging apparatus according to an embodiment includes: a first substrate on which a wireless communication coil is arranged; a wireless charging coil module including one or more wireless charging coils disposed under the first substrate; a shielding member disposed under the wireless charging coil module; a first support disposed under the shielding material and including a first support portion and a second support portion for supporting the first substrate; a second substrate disposed under the first bracket and including an electronic component; and a second bracket including a first support portion and a second support portion for supporting the second substrate, wherein the first support portion of the first bracket and the first support portion of the second bracket may form a first ground portion and a second ground portion, and the second support portion of the first bracket and the second support portion of the second bracket may form a third ground portion and a fourth ground portion.

In addition, in the wireless charging device according to the embodiment, one side of the first support portion of the first bracket and one side of the first support portion of the second bracket may be grounded through the first fastening member in the first grounding portion, the other side of the first support portion of the first bracket and the other side of the first support portion of the second bracket may be grounded through the second fastening member in the second grounding portion, one side of the second support portion of the first bracket and one side of the second support portion of the second bracket may be grounded through the third fastening member in the third grounding portion, and the other side of the second support portion of the first bracket and the other side of the second support portion of the second bracket may be grounded through the second fastening member in the fourth grounding portion.

[ beneficial effects ]

Effects of the wireless charging device including the wireless communication coil according to the present embodiment will be described below.

The present invention is directed to a wireless charging device including a wireless communication coil.

In addition, the invention provides a wireless charging device which comprises a wireless communication coil with low manufacturing cost.

From the following description, the desired effects of the present invention are not limited to the above-described effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention pertains.

Drawings

The accompanying drawings are provided to aid in the understanding of the invention and to provide examples of the invention and detailed description thereof. However, technical features of the present invention are not limited to the specific drawings, and features disclosed in each drawing may be combined with each other to form new embodiments.

Fig. 1 is a block diagram for describing a wireless charging system according to an embodiment.

Fig. 2 is a block diagram for describing the structure of a wireless power transmitter according to an embodiment.

Fig. 3 is a block diagram for describing a structure of a wireless power receiver interacting with the wireless power transmitter according to fig. 2.

Fig. 4 is a perspective view of the coil device according to the present embodiment.

Fig. 5 is an exploded perspective view of the coil device according to the present embodiment.

Fig. 6 is a side perspective view of the coil device according to the present embodiment.

Fig. 7 is a perspective view for describing a variation of a shielding material for controlling an inductance value of the coil device according to the present embodiment.

Fig. 8 is an exemplary view for describing a variable state of an inner diameter portion of a shielding material according to an embodiment.

Fig. 9 is an exemplary view for describing a variable state of an inner diameter portion of a shielding material according to another embodiment.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit and scope of the present invention is not limited to a portion of the described embodiments, and may be implemented in various other forms, and one or more elements of the embodiments may be selectively combined and substituted within the spirit and scope of the present invention. In addition, unless explicitly defined and described otherwise, terms (including technical and scientific terms) used in the embodiments of the present invention can be construed as having the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and terms such as those defined in commonly used dictionaries can be interpreted as having meanings consistent with their meanings in the relevant art. In addition, the terminology used in the embodiments of the invention is for the purpose of describing the embodiments and is not intended to be limiting of the invention. In this specification, unless explicitly stated in the phrase, the singular form may also include the plural form and may include at least one of all combinations that may be combined in A, B and C when described in "at least one (or more) of a (and), B and C". In addition, when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, "" coupled, "or" connected "to the other element, but can also be directly connected," coupled, "or" connected "between the element and the other element, or can be directly connected," coupled, "or connected," by another element, or can be directly connected, "or connected," by another element, when the element is referred to as being formed or arranged "on (above) or" below "each element, the" on (above) or "below" can include not only the two elements directly connected, but also one or more other elements formed or arranged between the two elements.

In the description embodiments, an apparatus for wirelessly transmitting power in a wireless power charging system will be referred to as a wireless power transmitter, a wireless power transmission apparatus, a transmission terminal, a transmitter, a transmission apparatus, a transmission side, a wireless power transmission apparatus, a wireless power transmitter, a wireless charging device, or the like for convenience of description. Further, the device for wirelessly receiving power from the wireless power transmitting device may be referred to as a wireless power receiving device, a wireless power receiver, a receiving terminal, a receiving side, a receiving device, a receiver terminal, or the like for convenience of description.

The wireless charging apparatus according to the embodiment may be provided as a pad type, a support type, an Access Point (AP) type, a small base station type, a cradle type, a ceiling embedded type, a wall hanging type, or the like. One transmitter may transmit power to a plurality of wireless power receiving apparatuses.

As an example, a wireless power transmitter may be generally used while being placed on a desk, and a wireless power transmitter developed for a vehicle may be used for the vehicle. The wireless power transmitter installed in the vehicle may be supported to be conveniently and stably held and supported.

The terminal according to the embodiment may be used for small-sized electronic devices such as mobile phones, smart phones, notebook computers (or laptop computers), digital broadcasting terminals, personal Digital Assistants (PDAs), portable Multimedia Players (PMPs), global Positioning Systems (GPS), MP3 players, electric toothbrushes, electronic tags, lighting systems, remote controllers, fishing floats, and the like, but is not limited thereto. Alternatively, the terminal may include any mobile device (hereinafter referred to as an "electronic device") provided with a wireless power receiving means and capable of charging a battery according to an embodiment, and both terms of "terminal" and "device" may be used at the same time. According to another embodiment, the wireless power receiver may be mounted to a vehicle, an unmanned aerial vehicle, an aerial drone, or the like.

According to an embodiment, the wireless power receiver may employ at least one wireless power transmission manner, and may simultaneously receive wireless power from two or more wireless power transmitters. Here, the wireless power transmission scheme may include at least one of an electromagnetic induction scheme, an electromagnetic resonance scheme, and an RF wireless power transmission scheme. In particular, the wireless power receiving tool supporting the electromagnetic induction scheme may include the wireless charging technique of the electromagnetic induction scheme defined in the AirFuel alliance (previously referred to as PMA) and the wireless power alliance (Wireless Power Consortium, WPC) (i.e., wireless charging technique standard organization). Further, the wireless power receiving tool supporting the electromagnetic resonance mode may include a wireless charging technology of a resonance mode defined in an Airfuel (formerly A4 WP) standard organization (i.e., a wireless charging technology standard organization).

In general, a wireless power transmitter and a wireless power receiver of a wireless power system may exchange control signals or information through in-band communication or Bluetooth Low Energy (BLE) communication. Here, the in-band communication and BLE communication may be performed by a Pulse Width Modulation (PWM) method, a Frequency Modulation (FM) method, a Phase Modulation (PM) method, an Amplitude Modulation (AM) method, an AM-PM method, and the like. For example, the wireless power receiver generates a feedback signal by applying a predetermined on/off switching pattern to a current induced through the receiving coil, thereby transmitting various control signals and information to the wireless power transmitter. The information received from the wireless power receiver may include various information, such as the intensity of the received power. In this case, the wireless power transmitter may calculate the charging efficiency or the power transmission efficiency based on information about the intensity of the received power.

Referring to fig. 1, a wireless charging system may generally include: a wireless power transmitter 10 for wirelessly transmitting power; a wireless power receiver 20 for receiving the transmitted power; and an electronic device 30, the received power being supplied to the electronic device 30.

For example, the wireless power transmitter 10 and the wireless power receiver 20 may perform in-band communication for exchanging information using the same frequency band as the operating frequency used in wireless power transmission. As another example, the wireless power transmitter 10 and the wireless power receiver 20 may perform out-of-band communication for exchanging information using another frequency band different from the operating frequency used in the wireless power transmission.

As an example, the information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include not only state information of each other but also control information. Here, the state information and control information exchanged between the transmitting and receiving terminals are further clarified by the description of the embodiments described later.

In-band communication and out-of-band communication may provide bi-directional communication, but are not limited thereto, and in other embodiments, uni-directional communication or half-duplex communication may be provided.

As an example, the unidirectional communication may refer to the wireless power receiver 20 transmitting information only to the wireless power transmitter 10, but is not limited thereto, and may refer to the wireless power transmitter 10 transmitting information to the wireless power receiver 20.

The half duplex communication method allows two-way communication between the wireless power receiver 20 and the wireless power transmitter 10, but allows information to be transmitted by only one device at any point in time.

The wireless power receiver 20 according to the embodiment may acquire various status information of the electronic device 30. As an example, the state information of the electronic device 30 may include current power usage information, information for identifying an application in operation, usage information of a Central Processing Unit (CPU), battery charge state information, battery output voltage/current information, and the like, but the present embodiment is not limited thereto, and any information that may be acquired from the electronic device 30 and may be used for wireless power control is sufficient.

Referring to fig. 2, the wireless power transmitter 200 may mainly include a power converter 210, a power transmitter 220, a wireless charging communicator 230, a controller 240, a current sensor 250, a temperature sensor 260, a storage part 270, a fan 280, a timer 290, a near field communicator 201, and a wireless communication coil. The configuration of the wireless power transmitter 200 is not a necessary configuration, and thus it should be noted that more or fewer elements than these elements may be included.

As shown in fig. 2, the power supply 100 may provide power. The power source 100 may correspond to a battery built in the wireless power transmitter 200, or may be an external power source. Embodiments are not limited in the type of power supply 100.

When receiving power from power supply 260, power converter 210 may perform a function of converting power into power having a predetermined intensity.

For this, the power converter 210 may include a DC/DC converter 211 and an amplifier 212.

The DC/DC converter 211 may perform a function of converting DC power supplied from the power supply 260 into DC power having a specific intensity according to a control signal of the controller 240.

The amplifier 212 may adjust the intensity of the DC/DC converted power according to a control signal of the controller 240. As an example, the controller 240 may receive power reception state information and/or a power control signal of the wireless power receiver through the wireless charging communicator 230 and dynamically adjust the amplification rate of the amplifier 212 based on the received power reception state information and/or the received power control signal. As an example, the power reception state information may include intensity information on the output voltage of the rectifier, intensity information on the current applied to the receiving coil, and the like, but the embodiment is not limited thereto. The power control signal may include a signal for requesting an increase in power, a signal for requesting a decrease in power, and the like.

The current sensor 250 may measure an input current to the driver 221. The current sensor 250 may provide the measured input current value to the controller 240. As an example, the controller 240 may adaptively cut off the power from the power source 100 or cut off the power supplied to the amplifier 212 based on the input current value measured by the current sensor 250.

The temperature sensor 260 may measure the internal temperature of the wireless power transmitter 200 and may provide the measurement result to the controller 240. More specifically, the temperature sensor 260 may include one or more temperature sensors. One or more temperature sensors corresponding to the transmitting coil 223 of the power transmitter 220 may be arranged to measure the temperature of the transmitting coil 223. As an example, the controller 240 may adaptively cut off power supplied from the power supply 100 or prevent power from being supplied to the amplifier 212 based on a temperature value measured by the temperature sensor 260. For this purpose, a predetermined power cut-off circuit for cutting off the power supplied from the power supply 100 or cutting off the power supplied to the amplifier 212 may be further provided at one side of the power converter 210. As another example, the controller 240 may adjust the intensity of the power supplied to the power transmitter 220 based on the temperature value measured by the temperature sensor 260. Therefore, the wireless power transmitter according to the embodiment can prevent the internal circuit from being damaged due to overheating.

The power transmitter 220 is used to transmit the power signal output from the power converter 210 to the wireless power receiver. To this end, the power transmitter 220 may include a driver 221, a selector 222, and one or more transmitting coils 223.

The driver 221 may generate an AC power signal in which an AC component having a specific frequency is inserted into the DC power signal output from the power converter 210 to transmit the AC power signal to the transmitting coil 223. In this case, frequencies of AC power signals transmitted to a plurality of transmission coils included in the transmission coil 223 may be the same as or different from each other.

The selector 222 may receive an AC power signal having a specific frequency from the driver 221 to transmit the AC power signal to a transmission coil selected from a plurality of transmission coils. Here, the selector 222 may control the transmission of the AC power signal to the transmission coil selected by the controller 240 according to a predetermined control signal of the controller 240. More specifically, the selector 222 may include a switch (not shown) connected to LC resonance circuits corresponding to the plurality of transmitting coils 223. The present embodiment is not limited thereto, and when the transmission coil 223 is configured of one transmission coil, the selector 222 may not be included in the power transmitter 220.

The transmitting coil 223 may include at least one transmitting coil, and the AC power signal received from the selector 222 may be transmitted to the receiver through the corresponding transmitting coil. When the transmission coil is plural, the transmission coil 223 may include first to nth transmission coils. To select a "corresponding transmit coil" from among the plurality of transmit coils, the selector 222 may be implemented as a switch or multiplexer (not shown) as shown in fig. 4. In addition, the transmitting coil 223 may include one capacitor (not shown) connected in series with a plurality of transmitting coils to implement an LC resonance circuit. One end of a capacitor (not shown) is connected to the transmitting coil 223, and the other end is connected to the driver 221. Here, the "corresponding transmitting coil" may refer to a transmitting coil having a state that may be coupled to a receiving coil of a wireless power receiver that may wirelessly receive power through an electromagnetic field. According to one embodiment, the controller 240 may dynamically select a transmission coil to be used for wireless power transmission among the set plurality of transmission coils based on a received signal strength indication corresponding to a digital ping signal transmitted for each transmission coil.

The controller 240 may control the selector 222 or a multiplexer (not shown) so that the sensing signals may be sequentially transmitted through the first n-th transmitting coil 222 during a main sensing signal transmission process. In this case, the controller 240 may identify a time point at which the sensing signal is transmitted by using the timer 290, and when the time point at which the sensing signal is transmitted arrives, the controller 240 may control the selector 222 or a multiplexer (not shown) to control so that the sensing signal may be transmitted through the corresponding transmitting coil. As an example, the timer 290 may transmit a specific event signal to the controller 240 at a predetermined period during a ping transmission period, and when a corresponding event signal is sensed, the controller 240 may control the selector 222 or a multiplexer (not shown) so that a digital ping may be transmitted through a corresponding transmitting coil.

The modulator 231 may modulate the control signal generated by the controller 240 and transmit it to the driver 221. Here, the method of modulating the control signal may include a Frequency Shift Keying (FSK) modulation method, a manchester code modulation method, a Phase Shift Keying (PSK) modulation method, a Pulse Width Modulation (PWM) method, a differential bi-phase modulation method, and the like, but the embodiment is not limited thereto.

When sensing a signal received through the transmitting coil, the demodulator 232 demodulates the sensed signal and transmits it to the controller 240. Here, the demodulated signal may include a signal strength indication, an Error Correction (EC) indication for controlling power during wireless power transmission, an End-Of-Charge (EOC) indication, an over-voltage/over-current/over-temperature indication, and the like, but the embodiment is not limited thereto and may include various status information for identifying the status Of the wireless power receiver.

In addition, the demodulator 232 may identify from which transmitting coil the demodulation signal is received, and may provide a predetermined transmitting coil identification corresponding to the identified transmitting coil to the controller 240.

As an example, the wireless power transmitter 200 may obtain the signal strength indication through in-band communication that communicates with the wireless power receiver using the same frequency used for wireless power transmission.

In addition, the wireless power transmitter 200 may transmit wireless power not only using the transmission coil 223, but also exchange various information with the wireless power receiver via the transmission coil 223. As another example, the wireless power transmitter 200 may additionally include a separate coil corresponding to each of the transmitting coils 223 (i.e., the first through nth transmitting coils), and it should be noted that in-band communication with the wireless power receiver may be performed by using the included separate coils.

The storage section 270 may store an input current value of the wireless power transmitter according to a charge state of the wireless power receiver, a charge power intensity, whether or not the charge is interrupted, a temperature at which the wireless power transmitter is to restart the charge, a time at which the charge is to restart the charge after the charge is stopped, whether or not the fan is operated, a fan rotation speed, and the like.

The fan 280 may be rotated by a motor to cool the overheated wireless power transmitter 200. The fan 280 may be arranged corresponding to a configuration in which the degree of overheating is severe. For example, the fan 280 may be arranged corresponding to the power transmitter 220. More specifically, the fan 280 may be disposed corresponding to the transmitting coil 223 of the power transmitter 220. The controller 240 may operate the fan 280 according to a state of charge of the wireless power receiver.

The near field communicator 201 may perform near field bi-directional communication through a frequency band different from a frequency band for transmitting a wireless power signal. As an example, the near field bi-directional communication may be a Near Field Communication (NFC) method. NFC is one of Radio Frequency Identification (RFID) technologies, and is a wireless communication technology that transmits and receives various wireless data within a short distance of 10 cm or less using a frequency of 13.56 MHz.

The wireless communication coil 202 may transmit/receive a signal used when performing near field two-way communication with a wireless power receiver.

Referring to fig. 3, the wireless power receiver 300 may include: wireless charging coil module 310, rectifier 320, DC/DC converter 330, load 340, sensor 350, wireless charging communicator 360, master controller 370, near field communicator 380, and wireless communication coil 390. Here, the wireless charging communicator 360 may include at least one of a demodulator 361 and a modulator 362.

In addition, the wireless power receiver 300 may include a near field communicator 380. The near field communicator 380 may perform near field bi-directional communication through a frequency band different from a frequency band used to transmit the wireless power signal. As an example, the near field bi-directional communication may be a Near Field Communication (NFC) method. NFC is one of Radio Frequency Identification (RFID) technologies, and is a wireless communication technology that transmits and receives various wireless data within a short distance of 10 cm or less using a frequency of 13.56 MHz.

In addition, the wireless power receiver 300 may include a wireless communication coil 390 for transmitting and receiving signals used in near field bi-directional communication with a wireless power transmitter.

AC power received via the wireless charging coil module 310 may be transferred to the rectifier 320. The rectifier 320 may convert the AC power to DC power and transfer it to the DC/DC converter 330. The DC/DC converter 330 may convert the intensity of the DC power output from the rectifier into a specific intensity required for the load 340 and then may transfer it to the load 340. In addition, the wireless charging coil module 310 may include a plurality of receiving coils (not shown), i.e., first to nth receiving coils. According to one embodiment, the frequencies of AC power transmitted to each receiving coil (not shown) may be different from each other, and in another embodiment, the resonance frequency of each receiving coil may be set to be different by using a predetermined frequency controller having a function of adjusting LC resonance characteristics to be different for each receiving coil.

The sensor 350 may measure the intensity of the DC power output from the rectifier 320 and may provide it to the main controller 370. In addition, the sensor 350 may measure the intensity of the current applied to the receiving coil 310 according to the received wireless power, and may transmit the measured result to the main controller 370. For example, the main controller 370 may compare the measured intensity of the DC power output from the rectifier with a predetermined reference value to determine whether an overvoltage occurs. As a result of the determination, when the overvoltage occurs, the main controller 370 may generate a predetermined packet informing that the overvoltage occurs to transmit it to the modulator 362. Here, the signal modulated by the modulator 362 may be transmitted to the wireless power transmitter via the receiving coil 310 or a separate coil (not shown). In addition, when the intensity of the DC power output from the rectifier is equal to or higher than a predetermined reference value, the main controller 370 may determine that the sensing signal is received, and may control such that when the sensing signal is received, a signal intensity indication corresponding to the sensing signal may be transmitted to the wireless power transmitter via the modulator 362. As another example, the demodulator 361 may modulate an AC power signal or a DC power signal output from the rectifier 320 between the receiving coil 310 and the rectifier 320 to recognize whether a sensing signal is received, and then may provide a recognition result to the main controller 370. At this time, the main controller 370 may control such that a signal strength indication corresponding to the sensing signal may be transmitted via the modulator 362. Further, the sensor 350 may measure an internal temperature of the wireless power receiver 300, and may provide the measured temperature value to the main controller 370. More specifically, the sensors 350 may include one or more temperature sensors. One or more temperature sensors may measure the temperature of the receiving coil of the charging coil module 310. As an example, the main controller 370 may determine whether the measured internal temperature is overheated by comparing it with a predetermined reference value. As a result of the determination, when overheating has occurred, a predetermined packet indicating that overheating has occurred may be generated and transmitted to the modulator 362. Here, the signal modulated by the modulator 362 may be transmitted to the wireless power transmitter via the receiving coil 310 or another coil (not shown).

Fig. 4 is a perspective view of a wireless charging apparatus according to one embodiment, fig. 5 is an exploded perspective view of the wireless charging apparatus according to one embodiment, fig. 6 is a first side view of the wireless charging apparatus according to one embodiment, and fig. 7 is a second side view of the wireless charging apparatus according to one embodiment.

Referring to fig. 4 and 5, a wireless charging apparatus according to an embodiment may include a first substrate 400. The first substrate 400 may be disposed on the wireless charging coil. In addition, the first substrate 400 may be rigid. The rigid first substrate 400 may support the wireless communication coil 500 disposed on an upper surface thereof. The wireless communication coil 500 may be formed by pattern printing on the first substrate 400. The first substrate 400 may include a first support part 410 disposed on one side thereof and a second support part 420 disposed on the other side thereof. In addition, the first support portion 410 of the first substrate 400 may be supported on the first surface 810a of the first support portion 810 of the first bracket 800. The second support part 420 of the first substrate 400 may be supported on the second surface 820a of the second support part 820 of the first bracket 800. In addition, the first support portion 410 of the first substrate 400 may be fixed to the first support portion 810 of the first bracket 800. The second support part 420 of the first substrate 400 may be fixed to the second support part 820 of the first bracket 800. More specifically, the first support portion 410 of the first substrate 400 may include first to second holes h1 to h2. The first surface 810a of the first support 810 of the first bracket 800 may include a fifth hole h5 and a first fixing groove 811. As shown in fig. 6 and 7, the first-first fastening member 1311 is inserted into the first and fifth holes h1 and h5, and thus, the first support portion 410 of the first substrate 400 may be fixed to the first surface 810a of the first support portion 810 of the first bracket 800. In addition, the first fixing groove 811 is inserted into the first hole h1, and thus, the first support portion 410 of the first substrate 400 may be fixed to the first surface 810a of the first support portion 810 of the first bracket 800. The second support part 420 of the first substrate 400 may include third to fourth holes h3 to h4. The first surface 820a of the second support part 820 of the first bracket 800 may include a ninth hole h9 and a second fixing groove 821. As shown in fig. 6 and 7, the first-second fastening members 1312 are inserted into the third and ninth holes h3 and h9, and thus, the second support part 420 of the first substrate 400 may be fixed to the first surface 820a of the second support part 820 of the first bracket 800. In addition, the second fixing groove 821 is inserted into the fourth hole h4, and thus, the second support part 420 of the first substrate 400 may be fixed to the first surface 820a of the second support part 820 of the first bracket 800. Further, the first substrate 400 may include a terminal portion (not shown) on a lower surface. The terminal part (not shown) may include one or more connection patterns, one or more external pads, and one or more through holes. The first substrate 400 may include a first connector 430. The first connector 430 may be disposed on one side of the first substrate 400. More specifically, the first connector 430 may be disposed corresponding to the first support portion 410 of the first substrate 400. The first connector 430 may include one or more first connection pins P. The wireless communication coil 500 disposed on the upper surface of the first substrate 400 may be electrically connected to one or more first connection pins P of the first connector 430 through one or more through holes, one or more connection patterns, and one or more external pads. In addition, the first connector 430 may include a Pin Support (Pin Support) PS. The pin holder PS may fix and support one or more first connection pins P. For example, referring to fig. 6, a pin holder PS is fixed under the first support part 410 of the first substrate 400, and one or more first connection pins P may be inserted into the pin holder PS. In addition, the area of the first substrate 400 may be larger than the areas of the wireless communication coil 500 disposed above, the wireless charging coil modules 610 to 630 disposed below, and the shielding material 700.

A wireless charging apparatus according to one embodiment may include a wireless communication coil 500. The wireless communication coil 500 may be disposed on the upper surface of the substrate 400. The wireless communication coil 500 may be an arranged wireless communication coil pattern. More specifically, the wireless communication coil 500 may include a wireless communication coil pattern disposed on the upper surface of the substrate 400 and a wireless communication coil connection pattern disposed on the lower surface of the substrate 400. That is, the wireless communication coil pattern and the wireless communication coil connection pattern may be connected as one body to form the wireless communication coil 500. That is, the wireless communication coil pattern and the wireless communication coil connection pattern are electrically connected, and thus, the wireless communication coil 500 may be arranged by rotating one or more times from one end to the other end.

A wireless charging apparatus according to one embodiment may include a wireless charging coil module. The wireless charging coil module may be disposed under the first substrate 400. The wireless charging coil module may include one or more wireless charging coils. The one or more wireless charging coils may be one or more transmit coils of a wireless power transmitter or one or more receive coils of a wireless power receiver. In addition, for example, when the wireless charging coils are plural, each of the wireless charging coils may be wound with the same number of turns, but the present invention is not limited thereto, and may be wound with different numbers of turns. Further, the plurality of wireless charging coils may have the same inductance, but the present invention is not limited thereto, and may have different inductances. Further, a plurality of wireless charging coils may be arranged in one or more layers. More specifically, the plurality of wireless charging coils may include first to third wireless charging coils 610 to 630. The second wireless charging coil 620 and the third wireless charging coil 630 may be disposed on a first layer on the same layer. The first wireless charging coil 610 may be disposed above the second wireless charging coil 620 and the third wireless charging coil 630. Accordingly, a plurality of wireless charging coils may be arranged on different layers to expand a charging area, so that wireless power may be effectively transmitted.

In addition, a wireless charging device according to one embodiment may include a shielding material 700. The shielding material 700 may be disposed on a lower surface of the wireless charging coil module. For example, when the wireless charging coils are plural, the shielding material 700 may be disposed on the lower surfaces of the second wireless charging coil 620 and the third wireless charging coil 630. An adhesive or an adhesive member (not shown) may be disposed between the upper surface of the shielding material 700 and the lower surfaces of the second and third wireless charging coils 620 and 630, and thus the shielding material (not shown) and the second and third wireless charging coils 620 and 630 may be fixed. In addition, the shielding material 700 may be disposed on the upper surface of the first bracket 800. The shielding material 700 may guide wireless power generated in the wireless charging coil module disposed above it in a charging direction and may protect various circuits disposed below it from electromagnetic fields.

In addition, the wireless charging apparatus according to one embodiment may include a first cradle 800. The first bracket 800 may be disposed on a lower surface of the shielding material 700. The first bracket 800 may be a conductive material. Further, the first bracket 800 may be a material having excellent thermal conductivity. Accordingly, the first bracket 800 may transfer heat generated from the wireless charging coil module. The first bracket 800 may include a first support 810 at one side and a second support 820 at the other side. The first support 810 of the first bracket 800 may include first to sixth surfaces 810a to 810f. The sixth surface 810f of the first support 810 may be bent vertically upward and extend from one side of the first bracket 800. The first surface 810a of the first support 810 may be vertically bent and extend from the sixth surface 810f of the first support 810. The first surface 810a of the first support 810 may include a fifth hole h5, a first fixing groove 811, and a first connector hole 812. The first connection pins P of the first connector 430 of the first substrate 400 may be disposed through the first connector holes 812. The first-first fastening member 1311 passes through the fifth hole h5, and thus the first surface 810a of the first support 810 may be fixed to the first support 410 of the first substrate 400. Further, the first fixing groove 811 is inserted into the first hole h1 of the first support portion 410 of the first substrate 400, and thus, the first surface 810a of the first support portion 810 may be fixed to the first support portion 410 of the first substrate 400. The second surface 810b of the first support 810 may be bent vertically downward and extend from one side of the first surface 810 a. The third surface 810c of the first support 810 may be vertically bent and extend from the second surface 810b of the first support 810. The third surface 810c of the first support 810 may include a sixth hole h6. The sixth hole h6 may be used to fix the first bracket 800, the second substrate 1000, and the second bracket 1100. In addition, the sixth hole h6 may be used to ground the first bracket 800 and the second bracket 1100. More specifically, as shown in fig. 4, 6 and 7, the second-first fastening member 1321 may pass through the sixth hole h6, the twelfth hole h12 of the second substrate 1000, and the eighteenth hole h18 of the second bracket 1100, and thus, the third surface 810c of the first support 810 may be fixed to the second substrate 1000 and the second bracket 1100. In addition, the third surface 810c of the first support 810 may be grounded with the second bracket 1100 through the second-first fastening member 1321. That is, a first ground portion a may be formed in which the first and second brackets 800 and 1100 are grounded through the second-first fastening member 1321. Accordingly, the wireless charging apparatus according to one embodiment may effectively transfer heat absorbed by the first bracket 800 from the wireless charging coil module to the second bracket 1100 through the first ground part a. In the first bracket 800, the fourth surface 810d of the first support 810 may be bent vertically downward and extend from the other side of the first surface 810 a. The fifth surface 810e of the first supporting part 810 may be vertically bent and extend from the fourth surface 810d of the first supporting part 810. The fifth surface 810e of the first support 810 may include a seventh hole h7 or an eighth hole h8. The eighth hole h8 may be used to fix the first bracket 800, the second substrate 1000, and the second bracket 1100. In addition, the eighth hole h8 may be used to ground the first bracket 800 and the second bracket 1100. More specifically, as shown in fig. 4, 6 and 7, the second-second fastening member 1322 may pass through the eighth hole h8, the tenth fourth hole h14 of the second substrate 1000, and the twentieth hole h20 of the second bracket 1100, and thus, the fifth surface 810e of the first support 810 may be fixed to the second substrate 1000 and the second bracket 1100. Further, the fifth surface 810e of the first support 810 may be grounded with the second bracket 1100 through the second-second fastening member 1322. That is, a second grounding part b may be formed in which the first bracket 800 and the second bracket 1100 are grounded through the second-second fastening member 1322. Accordingly, the wireless charging apparatus according to one embodiment may effectively transfer heat absorbed by the first bracket 800 from the wireless charging coil module to the second bracket 1100 through the second ground part b. The second support part 820 of the first bracket 800 may include first to sixth surfaces 820a to 820f. The sixth surface 820f of the second support part 820 may be bent vertically upward and extend from the other side of the first bracket 800. The first surface 810a of the second support part 820 may be vertically bent and extend from the sixth surface 820f of the second support part 820. The first surface 810a of the second support part 820 may include a ninth hole h9 and a second fixing groove 821. The first-second fastening members 1312 pass through the ninth hole h9, and thus the first surface 820a of the second support part 820 may be fixed to the second support part 420 of the first substrate 400. Further, the second fixing groove 821 is inserted into the fourth hole h4 of the second supporting part 420 of the first substrate 400, and thus, the first surface 820a of the second supporting part 820 may be fixed to the second supporting part 420 of the first substrate 400. The second surface 820b of the second support part 820 may be bent vertically downward and extend from one side of the first surface 820 a. The third surface 820c of the second support part 820 may be vertically bent and extend from the second surface 820b of the second support part 820. The third surface 820c of the second support part 820 may include tenth holes h10 and eleventh holes h11. The tenth hole h10 may be used to fix the first bracket 800, the second substrate 1000, and the second bracket 1100. In addition, the tenth hole h10 may be used to ground the first bracket 800 and the second bracket 1100. More specifically, as shown in fig. 4, 6 and 7, the second to third fastening members 1323 may pass through the tenth hole h10, the sixteenth hole h16 of the second substrate 1000 and the twenty second hole h22 of the second bracket 1100, and thus, the third surface 820c of the second support part 820 may be fixed to the second substrate 1000 and the second bracket 1100. In addition, the third surface 820c of the second support part 820 may be grounded with the second bracket 1100 through the second-third fastening member 1323. That is, a third ground portion c may be formed in which the first bracket 800 and the second bracket 1100 are grounded through the second-third fastening members 1323. Accordingly, the wireless charging apparatus according to one embodiment may effectively transfer heat absorbed by the first bracket 800 from the wireless charging coil module to the second bracket 1100 through the third ground part c. The fourth surface 820d of the second support part 820 may be bent vertically downward and extend from the other side of the first surface 820 a. The fifth surface 820e of the second support part 820 may be vertically bent and extend from the fourth surface 820d of the second support part 820. The fifth surface 820e of the second support part 820 may include a twelfth hole h12. The twelfth hole h12 may be used to fix the first bracket 800, the second substrate 1000, and the second bracket 1100. In addition, the twelfth hole h12 may be used to ground the first bracket 800 and the second bracket 1100. More specifically, as shown in fig. 4, 6 and 7, the second to fourth fastening members 1324 may pass through the twelfth hole h12, the eighteenth hole h18 of the second substrate 1000, and the twenty-fourth hole h24 of the second bracket 1100, and thus, the fifth surface 810e of the second support 820 may be fixed to the second substrate 1000 and the second bracket 1100. In addition, the fifth surface 820e of the second support part 820 may be grounded with the second bracket 1100 through the second to fourth fastening members 1324. That is, the fourth ground portion d may be formed in which the first and second brackets 800 and 1100 are grounded through the second-fourth fastening members 1324. Accordingly, the wireless charging apparatus according to one embodiment may effectively transfer heat absorbed by the first bracket 800 from the wireless charging coil module to the second bracket 1100 through the fourth ground d. In addition, the first bracket 800 may have a second connector portion 860 disposed between one side and the other side. The second connector 900 may be disposed in the second connector portion 860. The second connector portion 860 may have a shape corresponding to the third substrate 910 of the second connector 900. For example, the second connector portion 860 may be formed to have a space in which the second connector 900 may be mounted. In addition, the first bracket 800 may include a plurality of fixing portions. The plurality of fixing portions may fix the first bracket 800 and the second substrate 1000. In addition, the plurality of fixing portions may shield electromagnetic interference (EMI) generated from the second substrate 1000. More specifically, the plurality of fixing portions may include first to third fixing portions 830 to 850. The first to third fixing portions 830 to 850 may be arranged corresponding to electronic parts generating EMI in the configuration of the second substrate 1000. Accordingly, the wireless charging device can prevent EMI generated from the inside from being released to the outside. The first fixing portion 830 may be disposed between one side of the first support 810 and one side of the second support 820 of the first bracket 800. The first fixing portion 830 may include a supporting protrusion 831 and a hook 832. The supporting protrusion 831 of the first fixing portion 830 may be bent and extend downward of the first bracket 800. The second substrate 1000 and the first bracket 800 may be spaced apart from each other by the support protrusions 831 of the first fixing portion 830. As an example, the height of the supporting protrusion 831 may be 0.3mm or more. Accordingly, electronic components disposed on the upper surface of the second substrate 1000 may be disposed. The hooks 832 of the first fixing portion 830 are coupled through the first fixing holes 1020 of the second substrate 1000, and a shielding portion 832b capable of shielding EMI is disposed on the lower surface of the second substrate 1000. More specifically, the hook 832 of the first fixing portion 830 includes an extension 832a and a shielding 832b. The extension 832a may be arranged to extend downward from the support protrusion 831 of the first fixing portion 830. The shielding portion 832b may be bent and extended in the direction of the first support portion 810 at one side of the extension portion 832a to form a wall. The second fixing portion 840 may be disposed adjacent to the other side of the first supporting portion 810 of the first bracket 800. The second fixing portion 840 may include a supporting protrusion 841 and a hook 842. The supporting protrusion 841 of the second fixing portion 840 may be bent and extend downward of the first bracket 800. The second substrate 1000 and the first bracket 800 may be spaced apart from each other by the support protrusions 841 of the second fixing portion 840. Accordingly, electronic components disposed on the upper surface of the second substrate 1000 may be disposed. The hooks 842 of the second fixing portion 840 are coupled through the second fixing holes 1030 of the second substrate 1000, and a shielding portion 842b capable of shielding EMI is disposed on the lower surface of the second substrate 1000. More specifically, the hook 842 of the second fixing portion 840 includes an extension (not shown) and a shield 842b. An extension (not shown) may be arranged to extend downward from the support protrusion 841 of the second fixing portion 840. The shielding portion 842b may be bent and extended in the direction of the second support portion 820 at one side of the extension portion (not shown) to form a wall. The third fixing portion 850 may be disposed adjacent to the other side of the second support 820 of the first bracket 800. The third fixing part 850 may include a supporting protrusion 851 and a hook part 852. The support protrusions 851 of the third fixing portion 850 may be bent and extend downward of the first bracket 800. The second substrate 1000 and the first bracket 800 may be spaced apart from each other by the support protrusions 851 of the third fixing portion 850. Accordingly, electronic components disposed on the upper surface of the second substrate 1000 may be disposed. The hook portion 852 of the third fixing portion 850 is coupled through the third fixing hole 1040 of the second substrate 1000, and a shielding portion 852b capable of shielding EMI is disposed on the lower surface of the second substrate 1000. More specifically, the hook 852 of the third fixing portion 850 includes an extension 852a (not shown) and a shield 852b. An extension (not shown) may be arranged to extend downward from the support protrusion 851 of the third fixing portion 850. The shielding part 852b may be bent and extended in the direction of the second support part 820 at one side of the extension part (not shown) to form a wall.

The wireless charging apparatus according to one embodiment may include a second connector 900. The second connector 900 may include a third substrate 910 and a second connection pin 920. The third substrate 910 may be disposed at a lower end of the shielding material 700, and may be disposed on the same layer as the first holder 800. The third substrate 910 may be rigid. When the second connection pins 920 are connected to an external device, the rigid substrate 910 may support the second connection pins 920. The second connection pins 920 may be plural. Each of the second connection pins 920 may be disposed through the third substrate 910. The second connection pin 920 may be electrically connected to a wireless charging coil of the wireless charging coil module. In addition, the second connection pin 920 may be electrically connected to a temperature sensor (not shown).

The wireless charging apparatus according to one embodiment may include a second substrate 1000. The second substrate 1000 may be disposed on the second support 1100. Electronic components (not shown) for wireless charging or wireless communication may be disposed on the upper and lower surfaces of the second substrate 1000. In addition, the second substrate 1000 may be rigid. The rigid second substrate 1000 may be supported on the third surface 1110c and the fifth surface 1110e of the first support 1110 of the second bracket 1100, and the third surface 1120c and the fifth surface 1120e of the second support 1120. Further, the second substrate 1000 may be fixed to the third and fifth surfaces 1110c and 1110e of the first support portion 1110 of the second bracket 1100, and the third and fifth surfaces 1120c and 1120e of the second support portion 1120. More specifically, the second substrate 1000 may include thirteenth to eighteenth holes h13 to h18. The second-first fastener 1321 is inserted into the thirteenth hole h13, the second-second fastener 1322 is inserted into the fifteenth hole h15, the second-third fastener 1323 is inserted into the sixteenth hole h16, and the second-fourth fastener member 1324 is inserted into the eighteenth hole h18, and thus, the second substrate 1000 may be fixed to the first bracket 800 and the second bracket 1100. In addition, the second substrate 1000 may include first to third fixing holes 1020 to 1040. The first to third fixing portions 830 to 850 may be inserted into the first to third fixing holes 1020 to 1040, respectively. In addition, the second substrate 1000 may include one or more first connection Pin holes (Pin holes) PH. The first connection pin holes PH may be arranged to correspond to the first connection pins P of the first connector 430. Each of the corresponding one or more first connection pins P may pass through each of the one or more first connection pin holes PH.

In addition, the wireless charging apparatus according to an embodiment may include a second cradle 1100. The second support 1100 may be a conductive material. Further, the second support 1100 may be a material having excellent thermal conductivity. The second bracket 1100 may include a bottom surface 1100a, a first support 1110 at one side of the bottom surface 1100a, and a second support 1120 at the other side of the bottom surface 1100 a. The first support 1110 of the second bracket 1100 may include first to sixth surfaces 1110a to 1110e. The first surface 1110a of the first support 1110 may be one side of the bottom surface 1100a of the second bracket 1100. The second surface 1110b of the first support 1110 may be vertically bent and extend from one side of the first surface 1110a of the first support 1110. The third surface 1110c of the first support 1110 may be vertically bent and extend from the second surface 1110b of the first support 1110. The third surface 1110c of the first support 1110 may include a nineteenth hole h19. The second-first fastening member 1321 passes through the nineteenth hole h19, and thus, the third surface 1110c of the first support 1110 may be fixed to the second substrate 1000 and the third surface 810c of the first support 810 of the first bracket 800. In addition, the third surface 1110c of the first support 1110 may be grounded with the third surface 810c of the first support 810 of the first bracket 800 through the second-first fastening member 1321. The fourth surface 1110d of the first support 1110 may be vertically bent and extend from the other side of the first surface 1110a of the first support 1110. The fifth surface 1110e of the first support 1110 may be vertically bent and extend from the fourth surface 1110d of the first support 1110. The fifth surface 1110e of the first support 1110 may include a twentieth hole h20 and a twenty-first hole h21. In the fifth surface 1110e of the first support 1110, the second-second fastening member 1322 passes through the twenty-first hole h21, and thus, the fifth surface 1110e of the first support 1110 may be fixed to the second substrate 1000 and the fifth surface 810e of the first support 810 of the first bracket 800. In addition, the fifth surface 1110e of the first support 1110 may be grounded with the fifth surface 810e of the first support 810 of the first bracket 800 through the second-second fastening member 1322. Thus, in the wireless charging apparatus according to the embodiment, the second bracket 1100 may receive heat from the first bracket 800 to release the heat to the outside. The second support portion 1120 of the second bracket 1100 may include first to sixth surfaces 1120a to 1120e. The first surface 1120a of the second support 1120 may be the other side of the bottom surface 1100a of the second bracket 1100. The first surface 1120a of the second support part 1120 may include a fifth support part 1150, and the fifth support part 1150 has a concave shape concave toward the bottom surface 1100 a. The second surface 1120b of the second support part 1120 may be vertically bent and extend from one side of the first surface 1120a of the second support part 1120. The third surface 1120c of the second support part 1120 may be vertically bent and extend from the second surface 1120b of the second support part 1120. The third surface 1120c of the second support 1120 may include a twenty-second hole h22 and a twenty-third hole h23. The second-third fastening members 1323 pass through the twenty-second hole h22, and thus, the third surface 1120c of the second support 1120 may be fixed to the second substrate 1000 and the third surface 820c of the second support 820 of the first bracket 800. In addition, the third surface 1120c of the second support part 1120 may be grounded with the third surface 820c of the second support part 820 of the first bracket 800 through the second-third fastening member 1323. Accordingly, in the wireless charging apparatus according to the embodiment, the second bracket 1100 may receive heat from the first bracket 800 to release the heat to the outside. The fourth surface 1120d of the second support part 1120 may be vertically bent and extend from the other side of the first surface 1120a of the second support part 1120. The fifth surface 1120e of the second support part 1120 may be vertically bent and extend from the fourth surface 1120d of the second support part 1120. The fifth surface 1120e of the second support 1120 may include a twenty-fourth hole h24. The second to fourth fastening members 1324 pass through the twenty-fourth holes h24, and thus, the fifth surface 1120e of the second support 1120 may be fixed to the fifth surface 1120e of the second support 820 of the first bracket 800 and the second substrate 1000. In addition, the fifth surface 1120e of the second support part 1120 may be grounded with the fifth surface 1120e of the second support part 820 of the first bracket 800 through the second to fourth fastening members 1324. In addition, the second bracket 1100 may include a first shielding portion 1130 and a second shielding portion 1140. The first and second shielding parts 1130 and 1140 may shield EMI generated by the electronic parts disposed on the second substrate 1000 to avoid release thereof to the outside. More specifically, first shield 1130 may include a first surface 1130a and a second surface 1130b. The first surface 1130a of the first shielding part 1130 may be a bottom surface disposed between one side of the first surface 1110a of the first supporting part 1110 and one side of the first surface 1120a of the second supporting part 1120. The first surface 1130a of the first shielding part 1130 may be arranged to extend outwardly from one side of the first surface 1110a of the first supporting part 1110 and the other side of the first surface 1120a of the second supporting part 1120. The second surface 1130b of the first shielding portion 1130 may be vertically bent and extend from one side of the first surface 1130a of the first shielding portion 1130. The second surface 1130b of the first shielding portion 1130 may shield EMI generated by electronic components (not shown) of the second substrate 1000. The second surface 1130b of the first shielding portion 1130 may have a lower height than the lower side of the second substrate 1000 as shown in fig. 6 and 7. The present embodiment is not limited thereto, and the height of the second surface 1130b of the first shielding portion 1130 may be higher than the height at which the second substrate 1000 is disposed. The second shielding portion 1140 may include a first surface 1140a and a second surface 1140b. The first surface 1140a of the second shielding part 1140 may be a bottom surface disposed between the other side of the first surface 1110a of the first supporting part 1110 and the other side of the first surface 1120a of the second supporting part 1120. The first surface 1140a of the second shielding part 1140 may be arranged to extend outwardly from the other side of the first surface 1110a of the first supporting part 1110 and the other side of the first surface 1120a of the second supporting part 1120. The second surface 1140b of the second shielding part 1140 may be vertically bent and extend from one side of the first surface 1140a of the second shielding part 1140. The second surface 1140b of the second shielding part 1140 may shield EMI generated by electronic parts (not shown) of the second substrate 1000. The second surface 1140b of the second shielding part 1140 may have a lower height than the lower side of the second substrate 1000 as shown in fig. 6 and 7. The present embodiment is not limited thereto, and the second surface 1140b of the second shielding part 1140 may have a height higher than that at which the second substrate 1000 is disposed. In addition, the widths of the first and second shielding portions 1130 and 1140 may be arranged to correspond to electronic parts (not shown) arranged on the second substrate 1000. For example, as shown in fig. 5, the width of the first shielding portion 1130 may be smaller than the width of the second shielding portion 1140. The embodiment is not limited thereto, and the width of the first shielding portion 1130 may be equal to or greater than the width of the second shielding portion 1140. The second bracket 1100 may include a pillar portion 1150. When the pillar portion 1150 is coupled with the bottom cover, the pillar portion 1150 may contact the bottom cover. More specifically, the pillar portion 1150 may include first to fifth pillar portions 1151 to 1155. First pillar portion 1151 may be disposed between a side of first shielding portion 1130 and a side of first supporting portion 1110. The second leg portion 1152 may be disposed between the other side of the first support portion 1110 and one side of the second shielding portion 1140. The third pillar portion 1153 may be disposed between the other side of the first shielding portion 1130 and one side of the second supporting portion 1120. The fourth leg portion 1154 may be disposed between the other side of the second support portion 1120 and the other side of the second shielding portion 1140. The fifth strut portion 1155 may be disposed on the first surface 1120a of the second support portion 1120. The first to fourth pillar portions 1151 to 1154 may have a shape protruding or extending from the bottom surface 1110a to the outside of the second bracket 1100. The fifth pillar portion 1155 may have a concave shape concave toward the inside of the second bracket 1100.

Thus, in one embodiment, the wireless communication coil and the wireless charging coil module may be integrated into a compact form. In addition, in an embodiment, the structure is simple, the manufacturing process is simplified, and the manufacturing cost can be reduced. Further, in one embodiment, the heat generated by the wireless charging coil module is effectively diffused, and the heat dissipation effect is excellent. Further, in one embodiment, the EMI shielding performance is excellent, and the electronic component can be prevented from being damaged by EMI by using a plurality of EMI shields.

Fig. 8 is a perspective view of a wireless charging apparatus according to another embodiment, and fig. 9 is a third side view of the wireless charging apparatus according to another embodiment.

Fig. 8 and 9 have the same configuration except for a bottom cover 1200 in the wireless charging device according to one embodiment of fig. 4 to 7. Hereinafter, contents other than the same configuration as the wireless charging device according to one embodiment will be described.

Referring to fig. 8 and 9, a wireless charging device according to another embodiment may include a bottom cover 1200. The bottom cover 1200 may accommodate the second bracket 1100. Accordingly, the bottom cover 1200 may protect the second bracket 1100. The bottom cover 1200 may be a metal material having high thermal conductivity, high strength, high corrosion resistance, and light weight. As an example, the bottom cover 1200 may be steel or alloy. In addition, the bottom cover 1200 may include an inner support portion 1210. The inner support 1210 may contact the second bracket 1100 to support the second bracket 1100. In addition, the inner support 1210 may receive heat of the second bracket 1100 to radiate the heat to the outside. More specifically, the inner support 1210 may include first to fifth inner support 1211 to 1215. The first inner support portion 1211 may be disposed corresponding to the first pillar portion 1151 of the second bracket 1100. In addition, the first internal support portion 1211 may have a shape recessed inward from the outer wall of the bottom cover 1200. An inner surface of the first inner support 1211 may be in contact with the first leg portion 1151 of the second bracket 1100. Accordingly, the first inner support 1211 may support the first pillar portion 1151 of the second bracket 1100 and may receive heat. Further, the first inner support portion 1211 may be grounded to the first pillar portion 1151 of the second bracket 1100. Accordingly, EMI generated in the wireless charging device may be released to the outside through the bottom cover 1200. The second inner support 1212 may be arranged corresponding to the second pillar portion 1152 of the second bracket 1100. In addition, the second inner support 1212 may have a shape recessed inward from the outer wall of the bottom cover 1200. The inner surface of the second inner support 1212 may be in contact with the second leg portion 1152 of the second bracket 1100. Accordingly, the second inner support 1212 may support the second pillar portion 1152 of the second bracket 1100 and may receive heat. In addition, the second internal support 1212 may be grounded with the second leg 1152 of the second bracket 1100. Accordingly, EMI generated in the wireless charging device may be discharged to the outside through the bottom cover 1200. The third inner support portion 1213 may be provided corresponding to the third pillar portion 1153 of the second bracket 1100. In addition, the third internal support portion 1213 may have a shape recessed inward from the outer wall of the bottom cover 1200. An inner surface of the third inner support portion 1213 may be in contact with the third pillar portion 1153 of the second bracket 1100. Accordingly, the third inner support portion 1213 may support the third pillar portion 1153 of the second bracket 1100 and may receive heat of the second bracket 1100. Further, the third inner support portion 1213 may be grounded with the third pillar portion 1153 of the second bracket 1100. That is, as shown in fig. 9, the third pillar portion 1153 and the third inner support portion 1213 of the second bracket 1100 may form a fourth ground portion a. Accordingly, EMI generated in the wireless charging device may be released to the outside through the bottom cover 1200. The fourth inner support 1214 may be arranged corresponding to the fourth pillar portion 1154 of the second bracket 1100. In addition, the fourth internal support 1214 may have a shape recessed inward from the outer wall of the bottom cover 1200. An inner surface of the fourth inner support portion 1214 may be in contact with the fourth leg portion 1154 of the second bracket 1100. Accordingly, the fourth inner support 1214 may support the fourth pillar portion 1154 of the second bracket 1100 and may receive heat of the second bracket 1100. Further, the fourth inner support 1214 may be grounded with the fourth pillar portion 1154 of the second bracket 1100. That is, as shown in fig. 9, the fourth inner support portion 1214 and the fourth pillar portion 1154 of the second bracket 1100 may form a fifth ground portion B. Accordingly, EMI generated in the wireless charging device may be released to the outside through the bottom cover 1200. The fifth internal support portion 1215 may be arranged corresponding to the fifth pillar portion 1155 of the second bracket 1100. In addition, the fifth internal support 1215 may have a shape recessed inward from the outer wall of the bottom cover 1200. An inner surface of the fifth inner support 1215 may be in contact with the fifth strut portion 1155 of the second bracket 1100. Accordingly, the fifth inner support 1215 may support the fifth strut portion 1155 of the second bracket 1100 and may receive heat of the second bracket 1100. Further, the fifth inner support 1215 may be grounded with the fifth pillar portion 1155 of the second bracket 1100. That is, as shown in fig. 9, the fifth pillar portion 1155 and the fifth inner support portion 1215 of the second bracket 1100 may form a sixth ground contact portion C. Accordingly, EMI generated in the wireless charging device may be released to the outside through the bottom cover 1200. In addition, the bottom cover 1200 may include one or more heat dissipation holes. More specifically, the heat dissipation holes may include first through fifth heat dissipation holes 1221 through 1225. The first to fifth heat dissipation holes 1221 to 1225 may be arranged corresponding to the first to fifth internal support portions 1211 to 1215, respectively. As an example, the first heat dissipation hole 1221 may be disposed beside the first internal support 1211. The second heat radiation hole 1222 may be disposed beside the second inner support 1212. The third heat sink hole 1223 may be disposed beside the third inner support 1213. The fourth heat dissipation aperture 1224 may be disposed beside the fourth inner support 1214. The fifth heat sink hole 1225 may be disposed beside the fifth internal support 1215.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The foregoing detailed description is, therefore, not to be taken in a limiting sense, but is for the purpose of illustration. The scope of the embodiment must be determined by reasonable interpretation of the appended claims and all change which comes within the equivalent scope of the embodiment are intended to be embraced by the embodiment.

[ INDUSTRIAL APPLICABILITY ]

The embodiments may be used in the field of wireless power transmission and reception.

Claims

1. A wireless charging device, comprising:

a first substrate;

a first bracket including a first support portion and a second support portion for supporting the first substrate;

a plurality of wireless charging coils arranged between the first substrate and the first bracket;

a second substrate disposed under the first bracket and mounted with at least one electronic component; and

a second bracket including a first support portion and a second support portion for supporting the second substrate,

wherein the side portion of the second holder includes a shielding portion overlapping one side surface of the at least one electronic component and an opening not overlapping the one side surface of the at least one electronic component.

2. The wireless charging device according to claim 1, wherein a height of the shielding portion is formed lower than the second substrate.

3. The wireless charging device according to claim 1, wherein a height of the shielding portion is formed higher than the second substrate.

4. The wireless charging device of claim 1, wherein the shield comprises a first shield having a first width and a second shield having a second width.

5. The wireless charging device of claim 1, wherein the shielding portion shields electromagnetic interference generated from the at least one electronic component so that the electromagnetic interference is not emitted to the outside.

6. The wireless charging device of claim 1, wherein the first bracket comprises a securing portion that overlaps one side of the at least one electronic component.

7. The wireless charging device of claim 6, wherein the securing portion passes through the second substrate.

8. The wireless charging device of claim 7, wherein the second substrate includes a securing hole through which the securing portion passes.

9. The wireless charging device of claim 6, wherein the fixing portion is formed in plurality.

10. The wireless charging device of claim 6, wherein the fixing portion shields electromagnetic interference generated from the at least one electronic component so that the electromagnetic interference is not emitted to the outside.

11. The wireless charging device of claim 1, wherein the first substrate comprises a first connector connected to the second substrate.

12. The wireless charging device of claim 1, wherein the first substrate comprises a terminal portion on a lower surface of the first substrate.

13. The wireless charging device of claim 1, comprising:

and a second connector for connecting the plurality of wireless charging coils to the second substrate.

14. The wireless charging device of claim 12, wherein a second connector comprises a connection pin through the second substrate.

15. The wireless charging device of claim 1, comprising:

and shielding material arranged between the plurality of wireless charging coils and the first bracket.